Bottoming-machine.



A. B. STARR.

BOTTOMING MACHINE.

APPLIGATION FILED OUT. 2, 1913.

Patented Aug. 11, 1914.

ALDEN B. STARR, OF NEW YORK, N. Y.

BOTTOMING-MACHINE.

mo em.

To all whom it may concern Be it known that'I, ALDEN B. STARR, a citizenof the United States, residing at the city of New York, borough ofManhattan,

and State of New York, have invented certain new and useful Improvementsin Bottoming-Machinemof which the following is a full, clear, and exactdescription.

This invention relates to bottoming machines especially adapted forfixing the bottoms in receptacles, such as paper cartons and the like.

Certain machines of this character comprise an intermittently-rotatingdial upon.

which are mounted a plurality of mandrels. The open-ended tubes whichconstitute the side walls or body of the receptacle are placed overthese mandrels, which are then revolved to bring them in turn intooperative relation with suitable mechanism for emplacing the bottomswithin bodies of the receptacles carried thereby.

Attempts have been made heretofore to remove the finished receptaclefrom the mandrel by directing a compressed fluid medium against theinner surface of the bottom of thereceptacle, but the manner in whichthis has been accomplished has possessed certain inherent objections,chiefly due to the forma-.

tion of the passages for the fluid medium in the mandrel proper. Thesepassages frequently become clogged from various causes and in order toclear them, it is necessary to remove the mandrel from its supportingdial. Considerable care and extreme accuracy is required to reset themandrel upon the dial, so that, on rotation of the dial, the mandrelwill again be brought into exact vertical alinement with the mechanismfor fixing the bottom within the body portions.

The object of my invention is to overcome this objection and to therebyeliminate the loss of time and labor spent in resetting the mandrel onthe dial, and with this object in view, myinvention consists of meansfor directing the compressed fluid medium against the bottom of-thereceptacle, which means shall comprise a unitary structure, separate anddistinct from the mandrel and adapted to be placed over the outsidethereof so that it may-be easily removed therefrom without removing themandrel'from the dial.

My invention also consists of. the combinationof this improved structurefor directingthe fluid medium with a novel form of mandrel andappurtenant parts as will be Specification of Letters lat'ent.

Application filed October 2, 1913.

Patented Aug. 11, 1914. Serial No. 792,929.

set out in the specification and claims appended hereto.

In the drawings, Figure 1 is a central lon- 'gitudinalsection of amandrel on the line l1 of Fig. 3, showing my improved structure; Fig. 2is a detail sectional view on the line 2-2 of Fig. 3; Fig. 3 is a planview of the structure with the plunger die removed and a portion of theexpanding die broken away to show the ends of the tubes for carrying thecompressed fluid; and Fig. 4-. isa detail of the connections through thegialdto the tubes for carrying the compressed In the drawings, a hollowcylindrical mandrel 1, of a size to receive the open-ended tube 2 whichforms the side walls or body of the receptacle, is supported on anintermittently-rotating dial 3, only a portion of which is shown. Themandrel 1 is provided with a flange 4 by which the mandrel is fastenedto the dial by screws a, and surrounding the lower end of the mandrel isan annular collar 5 which forms the base for the tube 2. The tube 2 ismaintained rigidly positioned with respect to the mandrel 1 by anexpanding die consisting of four sectorlike jaws 7, the outer faces ofwhich are shaped to the curvature of the tube and provide a broadbearing surface, which, when the 'aws 7 are moved outwardly, firmly gripthe lnterior surface of the tube 3 and clamp the same to the mandrel.The jaws 7 which slide on the top of the mandrel, are retained thesleeve being slidably mounted within the hollow mandrel 1 which forms abearing therefor. The mechanism for-moving the sleeve 13 upwardly toforce the jaws 7 apart comprises a roller 14 carried by the lower end ofthe sleeve, which end is extended through the dial 2, the roller. 14riding over a stationary cam 15, mounted in the frame ofthe machine. Theroller 14 remains in engagement with the cam 15 while the operations ofemplacing the bottom within the tube are being performed. The jaws 7 arethereafter returned to their normal position by springs 16 which areplaced in the elongated slots 10 in the jaws 7.

Slidably mounted in the sleeve 13 is a plunger 17 to the top of which isattached a die 18 having a concave working face. The face of the die 18is adapted to co-act with a die (not shown) having a working faceofreverse curvature, the flat disk-like bottom 6 being clamped between.the two dies and distorted thereby decreasing its diameter, whereby itmay be readily placed within the open end of the tube 3.

The particular construction of the dies and their relation to each otherform no part of the present invention and are specifically described inmy application, Serial Number 793,978 filed Oct. 8, 1913.

The means for directing the compressed fluid medium against the innersurface of the bottom'of the finished receptacle consists broadly of twotubes 20 and the necessary connections to supply the compressed fluidthereto. The tubes 20 are, as shown, rectangular in cross-section forconvenience of construction and rest in substantially U-shaped grooves22 cut in the mandrel at diametrically-opposed points (see Fig. 3),although this construction is not essential since the tube may restagainst the outer peripheral surface of the mandrel if the same be of asufliciently small diameter so that the ends of the tubes 20 will notprevent the tubes from being slipped over the mandrel. The upper ends ofthe tubes 20 are open and are united by an annular ring 21 which restsin a slot 22 cut in the top of the mandrel, with the upper edges of thetubes 20 flush with the top of the mandrel, so

' that there will be no interference with the proper operation of thejaws 7 of the expanding die or chuck. The lower ends of the tubes 20 areclosed and are connected together by means of a ring 23 of larger di-.ameter than the ring 21 and of a size to permit the same to readily slipover the top .of the mandrel 1, the ring being held in place between theflange 4 of the mandrel and the base or collar 5. i

The cross-sectional area of the ring 23 is enlarged for substantiallyhalfof its circumference and is provided with an airpassage or conduit24 which communicates with the lower ends of the tubes 20 through a port25. Preferably integral with the ring 23 and located half way betweenthe two ports 25, is a hollow pipe or conduit 26. This pipe is Lshapedas shown in Fig. 4, and communicates at its ,free end with the hole 27in the dial 1. The other end ofthe hole or opening 27 is brought intocommunication by the intermittent rotation of the dial wit-h a pipe 2'8,which is fastened to the frame of the machine and is provided with agasket 29 which prevents leakage of the compressed fluid between thepipe and dial 1. The pipe 28 is connected to any suitable reservoir ofcompressed air (not shown).

Directly over the upper open ends of the tubes 20, the jaws 7 of theexpanding chuck and the plate are formed with circular recesses 30 whichdirect the passage of the compressed fluid from the tubes 20 to thelower face of the die 18. The die 18 is provided with four openings 31directly above the ends of the bolts 8, the openings 31 being ofsufficient diameter to permit the compressed air to readily pass throughthe space between the walls ofthese'openings and the sides of the bolts.During the emplacing of the bottom 6 in the end of the tube 3, the die18 is raised above the edge of this tube by a mechanism (not shown). Inthis position of the die, the openings 31 are liable to become cloggedby paper chippings, or from various other, causes. When the plunger thendrops to the position shown in Figs. 1 and 3, these openings, ifclogged, are automatically cleaned by the ends of the bolts 9 passinginto the same, the clearance between the Walls of the openings 31 andthe bolts 9 being sufficient to permit a sufficient quantity ofcompressed air to pass around the bolts which will therefore be directedagainst the bottom of the receptacle and remove the same in a practicaland expeditious manner. Pins 32 threaded into the lower face of the. die18 slide in vertically-arranged cylindrical recesses in the mandrel 1and prevent the plunger 17 from turning,

thus maintaining the openings 31 in the die 18 directly above the bolts9.

The operation is briefly as follows: After the bottom 6 has been placedin the end of the tube 3 by the die 18 and the parts coacting therewith(not shown) and the edges of the tube projecting beyond the bottom 6have been crimped or curled inwardly as shown in dotted lines ,in Fig.1, the dial 3 then receives a further partial rotation which issufiicient to clear the roller 14 from the end of the stationary cam 15.The sleeve 13 then drops gravity and the jaws 7 of the expanding dle-orchuck are returned to their normal position by the tension of thesprings 16. The finished receptacle is then ready to be removed. As thedial 3 is turned to its last-mentioned position, the hole 27 in the dial3 is brought into alinement with the pipe 28 and the compressed fluidmay then pass through the pipe 26 and the conduit 24 in the rin 23through ports 25 to the tubes 20. In this position of the dial, the die18 is in the position shown in Fig. 2 and the compressed fluid thenpasses through the recesses 30 in the-jaws 7 and plate .8 to the lowerface of the plunger die 18. The compressed fluid then passes through thespaces provided between the walls of the openings 31 and the bolts 9 andis directed against substantially the entire inner surface of the bottom6, the pressure of the fluid blowing the finished receptacle off themandrel. When it is desired to remove the tubes 20 to clean them, if thesame should become clogged, the plunger 17 and the jaws '7 are firstremoved, after which the tubes 20 and their supporting structure may bereadily removed from the mandrel without taking the mandrel from thebase, so that once the mandrel has been properly set on the dial itsposition is not interfered with.

Having described my invention, I claim 1. In a bottoming machine arotating dial, a mandrel on said dial over which is positioned the bodyof the. receptacle, means for directing a compressed fluid mediumagainst the bottom of the receptacle to remove the sanie from themandrel when said mandrel reaches a determined point in its path, saidmeans comprising a structure removably supported on said mandrel.

2. In a bottoming machine, a mandrel over which is positioned the bodyof the receptacle, means for directing a compressed fluid medium againstthe bottom of the re ceptacle to remove the same from the mandrelcomprising a plurality of tubes ar ranged around said mandrel, and meanssupported by said mandrel for uniting the ends of the tubes, said tubesand means forming a unitary structure removable from the mandrel.

3. In a bottoming machine, a rotating dial, a mandrel fastened to saiddial over which is positioned the body of the receptacle, means fordirecting a compressed fluid medium against the bottom of the receptacleto remove it from the mandrel comprising a plurality of tubes mounted onsaid mandrel and communicating with openings in the dial, and means foradmitting compressed fluid to said opening at a predetermined period inthe rotation of the dial.

4. In a bottoming machine, a mandrel over which the body of thereceptacle is positioned, means for directing a compressed fluid mediumagainst the bottom of the receptacle to remove it from the mandrelcomprising a plurality of tubes mounted on said mandrel, a ring forconnecting said tubes to gether at one of their ends, said ring having aconduit therein communicating with each of said tubes and a pipeconnected to said last-named ring and opening into said conduit.

5. In a bottoming machine, the combina tion of a mandrel over which thebody of the receptacle is positioned, a solid circular die mounted onsaid mandrel and adapted to fit within the open end of the tube, meansfor directing a compressed fluid medium against the bottom of thereceptacle to remove it from the mandrel comprising passages arrangedlongitudinally of the mandrel, said die having openings therein todistribute the air against the inner surface of the bottom of thereceptacle.

6. In a bottoming machine, the combination of a mandrel over which thebody of v the receptacle is positioned, a solid circular die mounted onsaid mandrel and adapted to fit within said body portion of thereceptacle, and an internal expanding die mounted on said mandrel withmeans for directing a compressed fluid medium against the bottom of thereceptacle comprising passages arranged longitudinally within themandrel, said expanding die and circular die having openingsthereinthrough which the compressed fluid medium is directed against thebottom of the receptacle.

In witnesswhereof, I subscribe my signature, in the presence of twowitnesses.

ALDEN B. STARR;

\Vitnesses YALDO M. CHAIIN, REL'BEX LODER.

